Materials / Compare
Brass C260 vs. Plastic PMMA
Compare Brass C260 vs. Plastic PMMA strength, stiffness, weight and thermal properties.
| Try it on a partA bracket to run stress or thermal on, free in your browser | Open in LessCAD | Open in LessCAD |
|---|---|---|
| Mechanical | ||
| Yield strength | 345MPasourcenominal, strip/flat, 0.5% extension (not 0.2% offset) | not given (tensile used) |
| Ultimate tensile strength | 427MPasourcenominal, strip/flat | 80MPasourcetypical, 23 °C |
| Compressive strength | not sourced | 110MPasourcecompressive yield stress, typical |
| Flexural strength | not sourced | 115MPasourcetypical |
| Elongation at break | 23%sourcenominal, in 2.0 in., strip/flat | 5.5%sourcetypical |
| Young's modulus (stiffness) | 110GPasourcetypical, temper-independent | 3.3GPasourcetypical, short-term |
| Density | 8,525kg/m³sourcenominal | 1,190kg/m³sourcetypical |
| Strength to weight | 40.5kN·m/kg | 67.2kN·m/kg1.66x higher |
| Stiffness to weight | 12.9MN·m/kg4.67x higher | 2.77MN·m/kg |
| Poisson's ratio | 0.34sourcereference value at room temperature (Wieland-M30 = CuZn30 = C26000, rolled products) | 0.37sourcetypical |
| Shear modulus | 41.2GPa34.2x stiffer in shear | 1.2GPa |
| Bulk modulus | 115GPa | 4.23GPa |
| Speed of sound | 3,597m/s | 1,665m/s |
| Thermal | ||
| Thermal conductivity | 121W/m·Ksourcetypical, 20 °C | 0.19W/m·Ksourcetypical |
| Thermal expansion | 20µm/m·Ksourcetypical, mean 20-300 °C | 70µm/m·Ksource0-50 °C |
| 100 mm part over a 50 °C swing | 100µm growth3.5x less | 350µm growth |
| Specific heat | 377J/kg·Ksourcetypical, 20 °C | 1,470J/kg·Ksourcetypical |
| Heats up and cools (diffusivity) | 37.7mm²/s347x faster | 0.109mm²/s |
| Thermal shock resistance | 12,510W/m302x more resistant | 41.5W/m |
| Melting point | 916–954°Csourcesolidus-liquidus | not sourced |
| Max service temperature | not sourced | 80°Csourcemax. permanent service temperature |
| Values for | C26000 cartridge brass, H02 half hard flat/strip: CDA Electronic Connector Design Guide (mechanical) + CDA alloy page (physical) | Röhm PLEXIGLAS GS 0F00 cast acrylic sheet, typical values at 23 °C / 50 % RH (Röhm Technical Information Ref. No. 211-1) |
Every value links to the document that states it. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.
Questions
Is Brass C260 stronger than Plastic PMMA?
Brass C260 is stronger: its yield strength is 345 MPa against tensile strength 80 MPa for Plastic PMMA (4.31x).
Which is lighter, Brass C260 or Plastic PMMA?
Plastic PMMA is lighter: 1,190 kg/m³ against 8,525 kg/m³ for Brass C260.
Which is stiffer, Brass C260 or Plastic PMMA?
Brass C260 is stiffer: Young's modulus 110 GPa against 3.3 GPa for Plastic PMMA, so the same part in Brass C260 deflects less under the same load.
Which is lighter for the same job, Brass C260 or Plastic PMMA?
For the same stiffness or strength: Brass C260 is lighter for a stiff rod or tie (tension); Plastic PMMA is lighter for a stiff beam (bending), stiff panel or plate, strong rod or tie, strong beam, strong panel or plate.
| Part that must be | Brass C260 | Plastic PMMA |
|---|---|---|
| Stiff rod or tie (tension) | lighter | 4.67x heavier |
| Stiff beam (bending) | 24% heavier | lighter |
| Stiff panel or plate | 2.22x heavier | lighter |
| Strong rod or tie | 1.66x heavier | lighter |
| Strong beam | 2.7x heavier | lighter |
| Strong panel or plate | 3.45x heavier | lighter |
For the same stiffness or strength, mass scales with density over stiffness (or strength) raised to a power set by how the part is loaded: 1 for a rod in tension, 1/2 for a beam in bending, 1/3 for a panel (the standard material-selection indices).
Which conducts heat better, Brass C260 or Plastic PMMA?
Brass C260 conducts heat better: 121 W/m·K against 0.19 W/m·K for Plastic PMMA.
Which expands less with temperature?
Brass C260 expands less: 20 µm/m·K against 70 µm/m·K for Plastic PMMA.